The best answer would be A.) stay in the car.
-do not have windows open, and do not touch the outside of the car.
Ag - 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s²4d⁹
It has to be below freezing in order for the snow to fall.
Answer:
The pH of a water at 25°C that contains 0.6580 mg/L carbonic acid is 5.7.
Explanation:
First, the molar mass of carbonic acid is 62g/mol, thus
The solution has a concentration of 1.06x10-5 mol/L.
Second, the acid-base balance is araised, with the initial and the equilibrium concentrations
H2CO3 + H2O ⇄ HCO3− + H3O+
i) 1.06x10-5 - -
eq) 1.06x10-5 - <em>x</em> <em>x</em> <em>x</em>
Knowing the Ka of carbonic acid (4.3x10-7) the expression of the equilibrium constant is written
Clearing the <em>x</em>, and solving the quadratic equation
Only the positive value is correct, so [H+ ]=[HCO3 − ] = 1.9x10-6
Since, pH = - Log [H+ ]